Self report | |||||
---|---|---|---|---|---|
CCR (ng/mg) | Smoker | Non-smoker | Total | Lee’s misclassification formula | |
CCR, cotinine/creatinine | |||||
A: If 10% smoke | |||||
High (>100) | 97 | 27 | 124 | =27/124=0.21 (21%) | |
Low (<100) | 3 | 873 | 876 | ||
Total | 100 | 900 | 1000 | ||
B: If 30% smoke | |||||
High (>100) | 291 | 21 | 312 | =21/312=0.06 (6%) | |
Low (<100) | 9 | 679 | 688 | ||
Total | 300 | 700 | 1000 |